CN107970964A - Carbon nitrence/silver/silver bromide composite nano materials, its preparation method and its application - Google Patents
Carbon nitrence/silver/silver bromide composite nano materials, its preparation method and its application Download PDFInfo
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- CN107970964A CN107970964A CN201610920410.7A CN201610920410A CN107970964A CN 107970964 A CN107970964 A CN 107970964A CN 201610920410 A CN201610920410 A CN 201610920410A CN 107970964 A CN107970964 A CN 107970964A
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- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 title claims abstract description 41
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 37
- 239000004332 silver Substances 0.000 title claims abstract description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 30
- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 239000002086 nanomaterial Substances 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004202 carbamide Substances 0.000 claims abstract description 9
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 8
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052794 bromium Inorganic materials 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003960 organic solvent Substances 0.000 claims abstract description 8
- 238000005245 sintering Methods 0.000 claims abstract description 5
- 239000007790 solid phase Substances 0.000 claims abstract description 5
- 239000004094 surface-active agent Substances 0.000 claims abstract description 5
- 238000001556 precipitation Methods 0.000 claims abstract description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 34
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 22
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N dimethyl sulfoxide Natural products CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 9
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 4
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 4
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 3
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 claims description 2
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 claims 1
- IAZDPXIOMUYVGZ-WFGJKAKNSA-N Dimethyl sulfoxide Chemical group [2H]C([2H])([2H])S(=O)C([2H])([2H])[2H] IAZDPXIOMUYVGZ-WFGJKAKNSA-N 0.000 claims 1
- RVGRUAULSDPKGF-UHFFFAOYSA-N Poloxamer Chemical compound C1CO1.CC1CO1 RVGRUAULSDPKGF-UHFFFAOYSA-N 0.000 claims 1
- 230000031709 bromination Effects 0.000 claims 1
- 238000005893 bromination reaction Methods 0.000 claims 1
- 229960000502 poloxamer Drugs 0.000 claims 1
- 229920001983 poloxamer Polymers 0.000 claims 1
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 claims 1
- 238000005829 trimerization reaction Methods 0.000 claims 1
- 230000001699 photocatalysis Effects 0.000 abstract description 9
- 239000011941 photocatalyst Substances 0.000 abstract description 9
- 238000007146 photocatalysis Methods 0.000 abstract description 8
- -1 silver bromide compound Chemical class 0.000 abstract description 7
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 8
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 235000019441 ethanol Nutrition 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000005119 centrifugation Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 235000008645 Chenopodium bonus henricus Nutrition 0.000 description 1
- 244000138502 Chenopodium bonus henricus Species 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000004087 circulation Effects 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 239000002322 conducting polymer Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 230000002079 cooperative effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
-
- B01J35/39—
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
The present invention relates to carbon nitrence/silver/silver bromide composite nano materials, its preparation method and its application, composite nano materials contain the g C of 5wt%~30wt%3N4, 65%~90% AgBr and the Ag of surplus, Ag/AgBr are attached to g C3N4Sheet surfaces.Preparation method is：G C are made in urea and melamine high temperature solid-phase sintering3N4Laminated structure；By g C3N4Nanometer sheet is distributed in organic solvent, add silver-colored source, bromine source and surfactant, pass through solution precipitation reaction, synthesis under the conditions of lucifuge, obtained graphite-like carbon nitrence/silver/silver bromide compound photocatalyst yield is high, and there is important application in the fields such as photocatalysis, air-sensitive, sewage disposal, it is expected to be used for large-scale industrial production.
Description
Technical field
The present invention relates to field of nanometer material technology, specifically be related to a kind of carbon nitrence/silver/silver bromide compound photocatalyst,
Its preparation method and its application.
Background technology
Under visible light conditions, the AgBr of highlight catalytic active can be reduced into elemental silver, while the plasma that surface is formed
Body causes its photocatalysis stability to be improved.But the consumption of a large amount of simple substance Ag so that the cost of catalysis material is continuously increased,
Limit its development as photochemical catalyst.Therefore how to continue to improve photocatalytic activity and stability while cost is reduced
As the research emphasis of AgBr photochemical catalysts.
Novel graphite phase carbon nitride (g-C3N4) be a kind of semi-conducting polymer being made of non-metal carbon nitrogen, its structure with
Graphene is similar, has two-dimension plane structure.C is proposed from nineteen twenty-two3N4Since this concept, C3N4It is deemed likely to α
Phase, β phases, Emission in Cubic, quasi- Emission in Cubic and class graphite-phase (g-C3N4) five kinds of structures.Further theoretical research shows g-C3N4It is room
The allotrope being most stabilized under temperature.g-C3N4With typical characteristic of semiconductor, its energy gap is about 2.7eV, can be inhaled
Zoom in the ultraviolet-visible light in 470nm.Because its unique semiconductor energy band structure, excellent chemical stability, be easy to regulation and control with
And the characteristic such as special two-dimensional structure, by g-C3N4With other function semiconductor combinations, with reference to both advantages, may prepare
Go out some materials with cooperative effect.
The content of the invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide carbon nitrence/silver/silver bromide composite Nano material
Material, its preparation method and its application, the of low cost of raw material, technique are simple, the yield of product is high and have higher photocatalysis
Efficiency.
Above-mentioned purpose is achieved by the following technical solution：
A kind of carbon nitrence/silver/silver bromide (g-C3N4/ Ag/AgBr) composite nano materials, its main ingredient g-C3N4Matter
It is 65%~90% to measure the mass percentage that percentage composition is 5%~30%, AgBr, and simple substance Ag contents are 0.5%~5%.
The black spheric granules of 100-200nm sizes is presented in Ag/AgBr, is attached to g-C3N4Sheet surfaces.
It is preferred that g-C3N4Mass percentage be 5%~10%, simple substance Ag contents are 0.5%~5%, and surplus is
AgBr。
A kind of preparation method of carbon nitrence/silver/silver bromide composite nano materials, includes the following steps：
Step (1), the g-C of lamellar structure3N4Synthesis：The mixture of urea and melamine is placed in silica crucible,
G-C is made in 400 DEG C~650 DEG C 0.5~4h of solid-phase sintering in tube furnace3N4Laminated structure, heating rate 5/min；
The mixture of urea and melamine, its molar ratio are 1：0.5-1:6, preferably 1:1；
Solid-phase sintering, preferably at 580 DEG C, keeps the temperature 1h.
The synthesis of step (2) carbon nitrence/silver/silver bromide compound photocatalyst：Under conditions of stirring and ultrasonic wave, it will walk
Suddenly (1) prepares gained g-C3N4Nanometer sheet is distributed in organic solvent, then silver-colored source, bromine source and surfactant are added and reacted
In liquid, then at ambient temperature, directly pass through the synthesis of solution precipitation reaction.
The reaction of step (2) is completed under the conditions of lucifuge.
It is preferred that after bromine source is dissolved into organic solvent, in a manner of dropwise addition, the organic molten of carbon nitrence/silver source is added to
In agent solution；
The silver-colored source is AgNO3；
Bromine source is inorganic salts, such as KBr, NaBr, (NH4) Br, or organic bromide, such as cetyl trimethylammonium bromide
(CTAB)；Or bromine source is inorganic salts and the mixture of organic bromide；
Organic solvent is dimethyl sulfoxide (DMSO), ethanol or ethylene glycol, and the ratio of solute and solvent is 25-150/
100mL；
Surfactant is polyvinylpyrrolidone (PVP), cetyl trimethylammonium bromide (CTAB) or pool Lip river are husky
Nurse (F-127).
Elemental silver issues third contact of a total solar or lunar eclipse chemical reaction in illumination condition by AgBr and is converted into elemental silver and obtains, therefore elemental silver
Content can control by adjusting light application time.
Carbon nitrence/silver/silver bromide composite nano materials are as photochemical catalyst, for organic in treatment of Organic Wastewater, air
The degraded of pollutant.
The present invention prepares carbon nitrence/silver/silver bromide compound photocatalyst, and technique is simple, and product has high photocatalysis
Performance.Compared to pure silver bromide, photo-catalysis capability lifts 10-20%, degradation time 10-15min, and stability has also carried
Height, after 5 circulations, the degradation rate of RhB remains to reach 85%, therefore has weight in the fields such as photocatalysis, air-sensitive, sewage disposal
The application wanted, is expected to be used for large-scale industrial production.
The present invention uses cost of material inexpensive, and simple production process is easily-controllable, and efficiency of pcr product is high, is adapted to large-scale industry
Production.
Brief description of the drawings
Fig. 1 is the transmission electron microscope picture of carbon nitrence/silver/silver bromide compound photocatalyst produced by the present invention.Can from Fig. 1 a
To see, high-specific surface area g-C3N4For typical thin slice band cavernous structure, the forms such as tiling, folding and curling are presented.Ag/
The black spheric granules of 100-200nm sizes is presented in AgBr, is preferably attached to g-C3N4Sheet surfaces (Fig. 1 b).
Fig. 2 is the XRD spectrum and the full spectrograms of XPS of carbon nitrence/silver/silver bromide compound photocatalyst produced by the present invention.Figure
2a describes the crystal structure and crystalline phase composition of Ag/AgBr and carbon nitrence/silver/silver bromide composite photocatalyst material.Institute in figure
(111) shown, (200), (220), (311), (222), (400), diffraction maximum and AgBr standard cards representated by (420) crystal face
The characteristic peak positions of (JCPDS Card No.06-0438) essentially coincide, it was demonstrated that AgBr particles in composite photocatalyst material
In the presence of g-C3N4Introducing not change AgBr crystal structure.But fail to find g-C in XRD spectrum3N4And simple substance
The corresponding diffraction maximum of silver occurs, this is because occupation ratio too low in catalyst and beyond the test model of X-ray diffraction analysis
Caused by enclosing.To prove the presence of both materials, we carry out XPS tests to sample, its test result is as shown in Figure 2 b.
The full spectrograms of XPS demonstrate the presence of tetra- kinds of elements of Ag, Br, C, N in composite sample, and a small amount of O peaks are probably due to experiment test
During CO2Absorb.
Fig. 3 is that carbon nitrence/silver/silver bromide compound photocatalyst produced by the present invention is bent to the photocatalytic degradation of different dyes
Line.g-C3N4Additive amount be respectively 0,5%, 10%, 15%, 20%, 30%, its synthetic product is respectively defined as C-0, C-1,
C-2, C-3, C-4, C-5.As seen from the figure, under visible light illumination, the photocatalytic degradation efficiency of pure Ag/AgBr exists in 10min
65% or so (C-0), works as g-C3N4Additive amount is stepped up to (C-1~C-5) during 150mg, its photocatalytic degradation efficiency from 25mg
It is respectively：75%, 80%, 79%, 75%, 60%, the trend for first increasing and dropping afterwards is presented.This is because a small amount of g-C3N4It will promote
Pair production efficiently separates, and accelerates electronics transfer, reduces Ag/AgBr granular sizes, increase reaction contact surface, so as to improve
Photocatalysis performance.But work as g-C3N4When excessive, Ag/AgBr particles are wrapped reunion, thus its photocatalysis performance is restricted.
Embodiment
The present invention is further described below by way of embodiment, as known by the technical knowledge, the present invention can also pass through it
Its scheme for not departing from the technology of the present invention feature describes, therefore all within the scope of the present invention or in the equivalent scope of the invention
Change be included in the invention.
Reagent of the present invention is commercial product, can be through commercially available acquisition.
Embodiment 1：
(1) by 10g urea and melamine mixture (molar ratio 1:1) add in crucible, then again in Muffle furnace with 580
DEG C roasting 1h, heating rate 5/min.The yellow powder of synthesis is washed for several times, most repeatedly with deionized water and absolute ethyl alcohol
60 DEG C of dry 12h obtain g-C under vacuum afterwards3N4Lamellar structure；
(2) by 50mg steps (1) prepared by g-C3N4Nanometer sheet is dissolved in 100mL dimethyl sulfoxides (DMSO), is added at the same time
Enter 0.1g PVP, 1.69g AgNO3, ultrasonic disperse at least 2h；
(3) by 1.03g NaBr be dissolved in 20mL DMSO formed solution be added drop-wise to dropwise in the solution of step (2) and fully
Centrifugation, 60 DEG C of drying are repeatedly washed with deionized water and ethanol after stirring 1h, then carbon nitrogen is obtained through 50W high voltage mercury lamp radiations 1min
Alkene/silver/silver bromide (being defined as C1), yield 98%.
Embodiment 2：
(1) by the 10g urea weighed and melamine mixture (molar ratio 1:0.5) add in crucible, then Muffle again
With 400 DEG C of roastings 1h, heating rate 5/min in stove.The yellow powder of synthesis is washed repeatedly with deionized water and absolute ethyl alcohol
Wash for several times, finally 60 DEG C of dry 12h obtain g-C under vacuum3N4Lamellar structure；
(2) by 75mg steps (1) prepared by g-C3N4Be dissolved in 100mL ethanol, at the same add 0.2g F-127,
1.69g AgNO3, ultrasonic disperse at least 2h；
(3) 1.31g KBr are dissolved in 20mL ethanol form solution and be added drop-wise in the solution of step (2) and fully stir dropwise
Mix and repeatedly wash centrifugation with deionized water and ethanol after 1h, 60 DEG C of drying, then through 50W high voltage mercury lamp radiations 2min obtain carbon nitrence/
Silver/silver bromide (is defined as C2), yield 95%.
Embodiment 3：
(1) by the 10g urea weighed and melamine mixture (molar ratio 1:6) add in crucible, then Muffle furnace again
In with 650 DEG C roasting 1h, heating rate 5/min.The yellow powder of synthesis is washed repeatedly with deionized water and absolute ethyl alcohol
For several times, finally 60 DEG C of dry 12h obtain g-C under vacuum3N4Lamellar structure；
(2) by 150mg steps (1) prepared by g-C3N4Be dissolved in 100mL ethylene glycol, at the same add 0.1g CTAB,
1.69g AgNO3, ultrasonic disperse at least 2h；By 0.8g NH4Br is dissolved in 20mL ethylene glycol, is formed solution and is added drop-wise to step dropwise
(2) in solution and it is sufficiently stirred after 1h and repeatedly washs centrifugation with deionized water and ethanol, 60 DEG C of drying, then through 50W high-pressure mercuries
Light irradiation 5min, obtains carbon nitrence/silver/silver bromide, in (being defined as C5), yield 97%.
Claims (9)
- A kind of 1. carbon nitrence/silver/silver bromide composite nano materials, it is characterised in that g-C3N4Mass percentage for 5%~ The mass percentage of 30%, AgBr are 65%~90%, and simple substance Ag contents are 0.5%~5%；100- is presented in Ag/AgBr The black spheric granules of 200nm sizes, is attached to g-C3N4Sheet surfaces.
- 2. carbon nitrence/silver/silver bromide composite nano materials according to claim 1, it is characterised in that g-C3N4Quality hundred It is 5%~10% to divide content, and simple substance Ag contents are 0.5%~5%, surplus AgBr.
- 3. the preparation method of carbon nitrence/silver/silver bromide composite nano materials described in claim 1 or 2, it is characterised in that bag Include following steps：Step (1), the g-C of lamellar structure3N4Synthesis：The mixture of urea and melamine is placed in silica crucible, in pipe G-C is made in 400 DEG C~650 DEG C 0.5~4h of solid-phase sintering in formula stove3N4Laminated structure, heating rate 5/min；Urea and trimerization The molar ratio of cyanamide is 1：0.5-1:6；The synthesis of step (2), carbon nitrence/silver/bromination silver composite material：Under conditions of stirring and ultrasonic wave, step (1) is made The g-C of standby gained3N4Nanometer sheet is distributed in organic solvent, then silver-colored source, bromine source and surfactant are added in reaction solution, so Afterwards at ambient temperature, directly completed by the synthesis of solution precipitation reaction, the reaction of step (2) under the conditions of lucifuge.
- 4. the preparation method of carbon nitrence/silver/silver bromide composite nano materials described in claim 3, it is characterised in that step (1) in, the molar ratio of urea and melamine is 1:1；Solid-phase sintering is to keep the temperature 1h at 580 DEG C.
- 5. the preparation method of carbon nitrence/silver/silver bromide composite nano materials described in claim 3, it is characterised in that step (2) the silver-colored source described in is AgNO3；Bromine source is the mixture of inorganic salts, organic bromide, or both；Organic solvent is dimethyl sulfoxide, ethanol or ethylene glycol, and the ratio of solute and solvent is 25-150/100mL；Surfactant is polyvinylpyrrolidone, cetyl trimethylammonium bromide or poloxamer.
- 6. the preparation method of carbon nitrence/silver/silver bromide composite nano materials described in claim 5, it is characterised in that step (2) inorganic salts described in are KBr, NaBr or (NH4)Br；The organic bromide is cetyl trimethylammonium bromide.
- 7. the preparation method of carbon nitrence/silver/silver bromide composite nano materials described in claim 3, it is characterised in that step (2) after bromine source is dissolved into organic solvent in, in a manner of dropwise addition, it is added in the organic solvent solution in carbon nitrence/silver source.
- 8. the preparation method of carbon nitrence/silver/silver bromide composite nano materials described in claim 3, it is characterised in that elemental silver Content controlled by adjusting light application time.
- 9. carbon nitrence/silver/silver bromide composite nano materials described in claim 1 are as photochemical catalyst, at organic wastewater The degraded of organic pollution in reason, air.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108745415A (en) * | 2018-05-04 | 2018-11-06 | 江苏大学 | A kind of poly-o-phenylenediamine modification AgCl/g-C3N4Composite photo-catalyst and its preparation and application |
| CN109651634A (en) * | 2018-12-24 | 2019-04-19 | 中原工学院 | A kind of preparation method of the bionic thin film of stratiform anchoring |
| CN111420695A (en) * | 2020-04-22 | 2020-07-17 | 昆明理工大学 | Composite photocatalyst for degrading organic pollutants by visible light and preparation method thereof |
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| CN102836734A (en) * | 2012-09-20 | 2012-12-26 | 华东理工大学 | Method for preparing AgX@g-C3N4 composite photocatalytic material |
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| CN102836734A (en) * | 2012-09-20 | 2012-12-26 | 华东理工大学 | Method for preparing AgX@g-C3N4 composite photocatalytic material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108745415A (en) * | 2018-05-04 | 2018-11-06 | 江苏大学 | A kind of poly-o-phenylenediamine modification AgCl/g-C3N4Composite photo-catalyst and its preparation and application |
| CN108745415B (en) * | 2018-05-04 | 2021-05-25 | 江苏大学 | Poly-o-phenylenediamine modified AgCl/g-C3N4Composite photocatalyst and preparation and application thereof |
| CN109651634A (en) * | 2018-12-24 | 2019-04-19 | 中原工学院 | A kind of preparation method of the bionic thin film of stratiform anchoring |
| CN109651634B (en) * | 2018-12-24 | 2021-04-02 | 中原工学院 | Preparation method of layered anchored bionic film |
| CN111420695A (en) * | 2020-04-22 | 2020-07-17 | 昆明理工大学 | Composite photocatalyst for degrading organic pollutants by visible light and preparation method thereof |
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